As can be seen in figure REF , the dimensionless rescaled thickness of the upper film, \(\delta \hat{h}_\infty \) , is of the order of \(10^{-3}\)  to \(10^{-2}\)  in the range of parameters explored.
The corresponding dimensional thickness, \(\delta h_\infty = \ell _c Ca^{2/3} \times \delta \hat{h}_\infty \) , is therefore expected to be in the range \(20 - 200~\)  for the typical values \(Ca = 10^{-3}\)  and \(\ell _c \approx 2~\) .
Albeit small, these thicknesses are withing reach of techniques such as reflection interference contrast microscopy (RICM), as examplified by the recent measurements of [1]} on the oil layer wrapping water droplets advancing on lubricant-infused surfaces.
